The members of the First Family of entertainment are plastered all over our social media outlets, so it's hard to believe we are unfamiliar with any part of their lives. But they manage to surprise even in this unlikely department.

Record-holder? - Though Kim Kardashian's 72-day marriage to Kris Humphries has been relentlessly mocked, she doesn't hold the record for shortest marriage in the family. Her maternal grandmother, M.J. Shannon, was married for two months in the 1950s.

Kris's cheating fiasco - Kris's marriage to Robert Kardashian Sr. ended because she had an affair with a much younger man. After separating, she moved in with the other man, but the relationship ended when she walked in on him having sex with another woman.

Kim's 14th birthday party - She and T.J. ended up dating. In fact, her 14th birthday party was celebrated at Michael Jackson’s Neverland ranch, which Kim has said included baby elephants and chimpanzees in overalls.

Kim Kardashian kissed her stepbrother - Kim and Caitlyn Jenner's son Brandon (pictured) kissed when they were much younger. But apparently, it was the other brother, Brody, who had a crush on his stepsister.

Khloé was under the bed as her parents had sex - A young Khloé fell asleep under Kris and Bruce (now Caitlyn)'s bed during a game of hide-and-seek and woke up to the bed shaking. She was terrified to leave, so she stayed until the whole thing was over.

College graduates - Rob and Kourtney are the only two of the Kardashian-Jenner siblings who have college degrees. Kourtney has a degree in Theater Arts with a minor in Spanish, and Rob has a degree in business.

Kanye West's first cell phone - He has said he bought his first cell phone in 2011 when he learned Kim was planning to marry Kris Humphries. He wanted to tease her by sending her unflattering photos of the basketball player.

No one approved of Kris Humphries - The Kardashian clan disapproved of Kim's second husband. In fact, Khloé apparently got herself briefly uninvited to the wedding for questioning his intentions. At the wedding, she told a guest she didn't think the marriage was going to last six months.

Kylie's scar - Kylie isn't afraid to show the large scar she has on her left leg, but how did she get it? She hurt herself when she was about five jumping over a gate while playing hide-and-seek with Kendall.

How 'KUWTK' came to be - The idea for the reality show came from Deena Katz, the current casting director for 'Dancing With the Stars.' According to The Hollywood Reporter, Katz was at Kris's house one night and said: "This is a reality show—I think you should really talk to Ryan Seacrest."

Little-known (and highly entertaining) facts about the Kardashians

Do you think you know the family?

The members of the First Family of entertainment are plastered all over our social media outlets, so it's hard to believe we are unfamiliar with any part of their lives. But they manage to surprise even in this unlikely department.